broach vs sunburst

broach and sunburst both are nouns.

Word	Noun	Adjective	Verb	Adverb
broach	Yes	No	Yes	No
sunburst	Yes	No	No	No

As nouns, sunburst is a hyponym of broach; that is, sunburst is a word with a more specific, narrower meaning than broach:

broach (noun)	sunburst (noun)
a decorative pin worn by women	a jeweled brooch with a pattern resembling the sun
	a design consisting of a central disk resembling the sun and rays emanating from it
	a sudden emergence of the sun from behind clouds

broach (verb)	sunburst (verb)
bring up a topic for discussion